Dr Seuss books for $.99

Ok so I use to see this add ALLLLLL the time! I can't remember if its .99 cents per book or what. It was an add like those check adds (where you can pick from many pictures to buy your checks in) and like the next page was the Dr Seuss add... Well I never wanted paper books till now and I have NO idea where to find it : ( So do and of your know where the add runs (in the newspaper... Magazines)?